Rivet nut



FIG. 1 is a top perspective view of a rivet nut;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevational view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the rivet nut and form no part of the claimed design. 

CLAIM The ornamental design for a rivet nut, as shown and described. 